Upgrade from FAS2820 by converting to DS212C drive shelf
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You can perform a nondisruptive upgrade of a NetApp FAS2820 by converting each node to a DS212C drive shelf and then connecting it to the replacement nodes.
In this procedure, the FAS2820 high-availability (HA) pair controllers are called node1 and node2, and the replacement HA pair controllers are called node3 and node4.
Before converting FAS2820 node2 to a drive shelf, you migrate the logical interfaces (LIFs) and data aggregates on node2 to node1.
You convert FAS8280 node2 to a DS212C drive shelf and then connect to node4 before reassigning drives from node2 to node4.
After converting FAS2820 node2 to a DS212C drive shelf and connecting to node4, you reassign the drives that previously belonged to node2 to node4.
Before converting FAS2820 node1 to a drive shelf, you migrate the data aggregates, epsilon, and LIFs on node1 to node4.
You convert FAS2820 node1 to a DS212C drive shelf and connect to node3 before reassigning drives from node1 to node3.
After converting FAS2820 node1 to a DS212C drive and connecting to node3, you reassign the drives that previously belonged to node1 to node3.
To complete the upgrade, you connect node3 to node4 and then migrate the data LIFs and data aggregates on node4 to node3.